# Physics IGCSE CIE full syllabus notes

here are some of my notes that follow the syllabus if you find any things i should add just let me know, and i u have any questions feel free to let me know and ill do my best to answer them =)

Good luck with your exams

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• Created by: roshan
• Created on: 24-05-12 11:24

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PHYSICS
IGCSE
PHYSICSTM -Roshan Rao

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Formulae
Average speed = distance/time
Average acceleration = change in velocity/time taken.
Gravity = height of the fall x2/ time^2 (g = 2h/t^2).
Resultant force = mass x acceleration (f = ma)
Density = mass/volume
Weight = mass x g (w=mg)
Force = mass x acceleration.
Pressure = force/area
Work done = force x distance moved in the direction of the force.
P.E = mgh (mass x acceleration due to gravity x height)

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Speed of sound = distance travelled / time taken
*echo = x2 distance to wall / echo time
Refractive index = speed of light in a vacuum / speed of light in
medium (n=c/v)
Refractive index 2 = sin i/ sin r
Magnification = image height / object height
Angle of incidence = angle of reflection
Linear magnification = image height/object height = image
distance/object distance
Kelvin temp = Celsius temp + 273
Energy transferred (specific heat capacity) = mass x specific heat

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Resultant force (momentum) = change in momentum/ time
Power = energy transformed/ time taken
Power = voltage x current
Power = current^2 x time Electrical
energy
Energy transformed = power x time
Energy = voltage x current x time
Energy supplied = power (kW) x time (h)
Transformer turns ratio = output voltage/ input voltage = turns in
output coil/ turns in input coil
Power (transformer) = input voltage x input current = output
voltage x output current
Amount remaining (radioactive decay) = 1/ (2)^n…read more

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Units
Speed = m/s (meters per second)
Acceleration = m/s^2 (meters per second squared)
Gravity = m/s (meters per second) (free fall),
M/s^2 (meters per second squared) (acceleration due to gravity),
N/kg (newtons per kilogram) (weight)
Resultant force = N (newtons)
Density = m^3 (meters cubed)
Weight = N (newtons)
Force = N (newtons)
Pressure = pa (1Pascal = 1n/m^2)
Work = j (joules)
P.E = j (joules)

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Wave length = m (meters)
Speed of sound = (approx.) air: 330m/s, liquid: 1,500m/s,
Solid: 5,000m/s
Speed of light in a vacuum = 3,000,00 km/s (3,000,000 m/s)
Density of water = 1.0g/ cm^3
Density of aluminium = 2.7g/ cm^3
Density of copper = 8.9g/ cm^3
Density of lead = 11.4g/ cm^3
Density of mercury = 13.6 g/cm^3
Density of gold = 19.…read more

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Circuit Symbols
Made from a metallic conductor so current can
Wire easily pass from one part of the circuit to
another
On/Off switch ­ in open position the circuit is
Switch (open)
broken so no current flows
On/Off switch ­ in closed position the circuit is
Switch (closed)
complete and current flows
Supplies the electrical energy to the circuit ­
Cell the larger terminal on the left is the positive (+)
terminal
Battery A battery is more than one cell.…read more

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Speed, velocity and acceleration
Speed
Speed: the distance travelled between two points usually measured
in m/s (meters per second).
Average speed = distance/time.
Velocity
Velocity: the speed of an object and its direction.
For direction you can use words such as forward, backward, left,
right and for motion in a straight line you can use a + or ­
symbol(+=forward, -=backward).
Velocity is a vector (a vector is something that has mass as well as
direction).
Acceleration
Acceleration: the gradual change in speed.…read more

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Free Fall
Free fall: where something is falling with the effects of gravity and
air resistance acting on it.
Gravity (g) = 10m/s^2 (or 9.8m/s^2 to be more precise).
.
G (gravity) =acceleration of free fall.
.
To measure g the formula is
Gravity = height of the fall x2/ time^2 (g = 2h/t^2).…read more

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Speed time graph
On a speed time graph the gradient tells u how much speed is
gained every second (how fast the object is accelerating).
The gradient is equal to the acceleration.
To find the distance travelled you must find the area under the line.
If the gradient is diagonal the object has a steady (constant)
acceleration.
If the gradient is a straight line the object has a steady speed.
Volume and Density
Volume: the amount of space an object takes up.…read more